<template>
	<view>
		<view class="top-header">
			<!-- 头部 -->
			<!-- <view class="header">
				<icon type="search" size="16" color="#bbb">
				</icon>
				<input type="text" v-model="query" confirm-type="search" @confirm="reload">
			</view> -->
			<SearchBar @search="doSearch" :query="query"/>

			<!-- 过滤菜单 -->
			<view class="filter-menu">
				<view :class="{active:index===activeIndex}" v-for="(item,index) in menuList" :key="index" @click="selectMenu(index)">{{item}}
				</view>
			</view>
		</view>

		<!-- 商品列表 -->
		<view class="goods-list">
			<view class="goods" v-for="(item, index) in goodsList" :key="index" @click="toItem(item.goods_id)">
				<image :src="item.goods_small_logo" alt="">
					<view class="right">
						<view class="goods-name text-line2">{{item.goods_name}}</view>
						<view class="price">￥<text>{{item.goods_price}}</text>.00</view>
					</view>
			</view>
		</view>
		<view class="btm-line" v-show="isLastPage">
			--我是有底线的--
		</view>
	</view>
</template>

<script>
	import SearchBar from '@/components/SearchBar'

	const PAGE_SIZE = 6

	export default {
		components: {
			SearchBar
		},
		data() {
			return {
				menuList: [
					'综合',
					'销量',
					'价格'
				],
				// 当前过滤栏菜单选中的是哪一个
				activeIndex: 0,
				// 搜索商品列表
				goodsList: [],
				// 搜索关键字
				query: '',
				isLastPage: false
			}
		},
		onLoad(options) {
			// 页码初始值为1
			this.pageNum = 1
			// 默认不在请求中
			this.isRequesting = false
			this.query = options.catName
			// 发请求
			this.queryGoodslist()
		},
		onPullDownRefresh() {
			this.reload()
		},
		// 上拉加载
		onReachBottom() {
			// 页码+1,发请求
			this.pageNum++
			this.queryGoodslist()
		},
		methods: {
			// 子传父的事件处理方法,获取到子输入框的值,进行搜索
			doSearch(inputVal) {
				this.query = inputVal
				this.reload()
			},
			// 跳转商品详情
			toItem(goodsId) {
				uni.navigateTo({
					url: '/pages/item/item?goodsId=' + goodsId
				})
			},
			reload() {
				this.pageNum = 1
				// 清空goodsList
				this.goodsList = []
				this.isLastPage = false //重置
				this.queryGoodslist()
			},
			selectMenu(index) {
				this.activeIndex = index
			},
			async queryGoodslist() {
				// 进入请求前,判断如果请求中或者最后一页,return 
				if (this.isRequesting || this.isLastPage) {
					return
				}
				// 请求前,标识请求中
				this.isRequesting = true
				let data = await this.$request({
					url: '/api/public/v1/goods/search',
					data: {
						// query:query
						query: this.query,
						pagenum: this.pageNum,
						pagesize: PAGE_SIZE
					},
					showLoading: false
				})

				// 请求结束后,标识不在请求中
				this.isRequesting = false
				// 同时停止下拉刷新的动画
				uni.stopPullDownRefresh()
				// this.goodsList = data.goods
				// 数据的追加
				this.goodsList = [...this.goodsList, ...data.goods]
				// 如果goodsList的长度和data.total相等,那么就是最后一页
				if (this.goodsList.length === data.total) {
					this.isLastPage = true
				}
			}
		}
	}
</script>

<style lang="less">
	.top-header {
		position: sticky;
		top: 0;
		background-color: #fff;
		z-index:100;
	}

	.header {
		height: 120rpx;
		padding: 30rpx 16rpx;
		box-sizing: border-box;
		background-color: #eee;
		position: relative;

		icon {
			position: absolute;
			top: 48rpx;
			left: 44rpx;
		}

		input {
			height: 60rpx;
			width: 100%;
			border-radius: 4rpx;
			background-color: #fff;
			padding-left: 80rpx;
			box-sizing: border-box;
		}
	}

	.filter-menu {
		display: flex;
		justify-content: space-around;
		align-items: center;
		height: 100rpx;

		view.active {
			color: #EB4450;
		}
	}

	.goods {
		border-top: 1rpx solid #ddd;
		height: 260rpx;
		box-sizing: border-box;
		padding: 0 20rpx;
		display: flex;
		align-items: center;

		image {
			width: 200rpx;
			height: 200rpx;
		}

		.right {
			flex: 1;
			margin-left: 26rpx;

			.price {
				color: #eb4450;
				font-size: 24rpx;
				margin-top: 80rpx;

				text {
					font-size: 36rpx;
				}
			}
		}
	}

	.btm-line {
		text-align: center;
	}
</style>
